Răspuns:
100g CaC2...............50gpur
64gCaC2......................xg pur
mp= 64x50/100 = 32 g
MCaC2=40+2x12=64g/mol
64g..........................22,4l
CaC2 + H2O → C2H2 + CaO
32g........................yl C2H2
64 g CaC2............22.4 l C2H2
32 g CaC2............x l C2H2
y =32x22,4/64= 44,8 l C2H2
Explicație: